Amount of Output Data Required
• This is not a problem as the model runs very quickly.
• After around 50 customer arrivals the graphs seem to be converging to a reasonable level.
• To generate confidence intervals for the key output (time in system), multiple replications are used to assure independence in the samples.
• The table “Replication0641” (from Excel) that is from mean of service time = 0.64 min that shows the results from 127 replications.
• A significance level of 5% is used to construct 95% confidence intervals.
• From 127 replications the deviation of the intervals is below 5%. This is considered sufficient precision.